Regular servicing keeps an air conditioning system efficient, reliable and ready for the weeks when it actually matters. In a London flat or office, a neglected unit does not usually fail dramatically — it just quietly costs more to run, cools less, and then breaks in the middle of the first hot spell of the year, when every engineer in the city is already booked.
What a service should include
A competent service is not a five-minute visual check. Expect the engineer to work through the system properly and leave you with a written record of what they found.
- Filter cleaning or replacement, and a check of the airflow either side of the unit
- Condenser and evaporator coil cleaning — the single biggest driver of lost efficiency
- Refrigerant pressure check and a leak test, with any loss logged
- Drainage and condensate pump check, which is where most water damage claims begin
- Electrical connections, thermostat calibration and control testing
- A written service report you can hand to a tenant, a buyer or an insurer
How to choose a contractor
London has no shortage of firms advertising air conditioning maintenance. The differences that matter are not the ones on the front page of the website.
- F-Gas certification. Legally required for anyone handling refrigerant. Ask for the certificate number, not a logo.
- Experience with your manufacturer. Daikin, Mitsubishi and Fujitsu systems each have their own quirks and parts lead times.
- Public liability insurance. Check the figure, and check it is current.
- Response times in writing. A four-hour promise made on the phone is worth what you paid for it.
- Reviews that mention repeat visits. Anyone can do a good first job.
Tell us what you are dealing with.
Whatever brought you to this page, someone on our team has handled a version of it before — for a landlord, a tenant, a developer or an investor. Send us the details and we will come back with what we would do, what it should cost, and whether it is worth doing at all. Usually the same working day.
class="wide", which breaks it out past the text column. Drop the class for a standard-width image, or use class="portrait" for a 3:4 crop.What it means if you are a landlord
Air conditioning is rarely the thing that loses you a tenant on its own. It is the thing that turns a good tenancy into an adversarial one when it fails in July and nobody can say who is responsible for fixing it. Two habits prevent almost all of that.
- Put the servicing interval in the tenancy agreement, along with who arranges access and who pays.
- Keep the service reports. They settle disputes, support insurance claims, and answer the question a buyer's surveyor will eventually ask.
If the unit serves a communal area or sits in a building with a service charge, check the lease before arranging anything. Paying for a repair that was the freeholder's responsibility is a common and entirely avoidable mistake.
Commercial buildings
For offices, retail units and mixed-use blocks the calculation changes. Air conditioning becomes a lettability issue and a compliance one at the same time: comfort cooling affects how a space shows, while refrigerant handling, F-Gas record keeping and TM44 inspections affect whether you are meeting your obligations at all. On larger systems, a planned maintenance contract almost always costs less over three years than reactive callouts, and it gives you a paper trail when you come to sell or refinance.
The pattern we see most often is not neglect. It is a building where three different people each assumed one of the others had arranged the service.
How Fraser Bond fits in
We are not an air conditioning contractor and we will not pretend to be. What we do is manage the properties these systems sit in — appointing and supervising contractors, holding the compliance records, chasing the reports, and making sure the cost lands on the right party. For landlords with more than one property, that coordination is usually where the actual saving is.
If you are trying to work out whether something is your responsibility, what it should cost, or whether a quote you have been given is reasonable, that is a conversation worth having before you commit to anything.
